Glasses are made by simple procedure. The materials and the compositions could be different depending the purpose.
First, the materials, such as sand, soda, and limestone, are put in furnace to their melting point until they become liquid.
Then, the liquid is distributed to mould to be formed as bottle, plate, and many else..
After the liquid hardened and take the shape of it's mould, then the mould is removed and the glass is ready to use.
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